Motion converting mechanism



MOTION CONVERTING MECHANISM 3 Sheets-Sheet l Filed June 8, 1946 Sw QN QN a. N .MNM ,QN T 1| HOM IP S. S

ATTORNEY Sept' 11, 1951 A. A. BAMBERGER 2,567,798

MOTION CONVERTING MECHANISM Filed June 8, 1946 5 Sheets-Sheet 2 j y 6 INVENTOR ATTORNEY A. A. BAMBERGER MOTION CONYERTING MECHANISM sept. 11, 1951 5 Sheets-Sheet 5 Filed June 8, 1946 INVENTQR JWf/ea amer er BY MTTORNEY Patented Sept. 1,1, 1951 MOTION coNvERTlNG MECHANISM Alfred A. Bamberger, Flushing, N. Y., assigner to Speedo Manufacturing Co., Inc., New York,

Application June 8, 1946, Serial No. 675,362

2 Claims. (Cl. 74-44 This invention relates to reciprocating instruments. It is particularly directed to a mechanical dental or'jewelersl reciprocating instrument, such as a filing, burnishing, polishing, grinding, sawing or like mechanical instrument.

An object of this invention is to provide an improved instrument of the character described vdescribed provided at one end with means for gripping a chuck or the like rotary drive, and at its opposite end with a chuck to grip a tool to be rciprocated, said instrument being so constructed that it may readily be held in the hand during Ausefor otherwise xed so that its casing is held against'rotation. `Still a further object of this invention is to provide an instrument of the character de- 'scribed including afrotary shaft, provided with a beveled gear, a second beveled gear rotatably mounted within said instrument and meshing with the frstrgear, and a reciprocating element connected to the second gear, the arrangement being such that rotation of the shaft will cause reciprocation of said element. Y

Still a further object of this invention is to vprovide a compact and durable instrument of the character described whichshall be relatively vinexpensive to manufacture, easy to manipulate,

which shall be smooth and positive in operation,

and yet practical and efficient to a high degree .v

In the accompanying drawing, in which is shown one of the various possible illustrative em- .bodiments of this invention,

Fig. l is a side elevational view of an instrument embodying the invention;

Fig. 2 is a cross-sectional view taken on line4 2 2 of Fig. 1;

Fig. 3 is a cross-sectional view taken on line 3--3 of Fig. 2; Y

Fig. 4 is a cross-sectional View taken on line l-I of Fig. 3;

Fig. 5 isa side elevational view of a drillpress with an instrument embodying the invention partially connected thereto;

Fig. 5a is a cross-sectional view taken `on line 5a-5a of Fig. 5;

Fig. 6 is a partial view similar to Fig. 2 and illustrating a modified construction; v

Fig. 7 is a view similar to Fig. 6 and illustrating yet another modified construction; f

Fig. 8 is an axial cross-sectional view of an instrument embodying the invention and illustrating a modified form thereof; and .Y

Fig. 9 is a view similar to Fig-8 and illustrating yet another modiled form of the invention.

Referring now in detail to the drawing, I0 designates an instrument embodying the invention. The same comprises a casing I I having a bottom wall I2, Side walls I3 and tubular end portions vIl and I5. The casing V I I is open at the top and is formed with a central substantially cylindrical chamber I6. -The casing tapers from thesides thereof towards the ends as shown in Figs. 1 and 2 of the drawing.v The end portion I4 thereof is formed with an axial through openingvls com.- municating with chamber I6 and extending .to one end of the casing. Part of the through opening I8 is internally screw threaded as at I9. The end portion I5 of the casing is formed with an axial bore 20. Said casing has a -iiat top surface 2i as shown in Fig. 3 of the drawing, The axial bore 20 communicates with chamber I6. f

Said chamber has a flat bottom wall 22 and an inner cylindrical surface 24, The side walls I3 are formed at their outer surfaces with aligned, circularvrecesses 25. At the center of each recess is a threadedopening 26. The bottom wall I2 is formed in surface 22 thereof with a central threaded opening 28 for the purpose hereinafter appearing. 1

Chamber I6 may be closed by a cover 36 lying on surface 2l. The-cover 30 may beattached to the casing by means of a set. screw 32 passing through an opening therein and screwed into a threaded opening 33 in portion I4 of the casing.

Screwed within the threaded opening I9 is an inner externally threaded sleeve 35. The sleeve 35 is formed with an axial through bore 36. It extends beyond the casing as at 31. .Attached to member 35 is an outer sleeve 40 coaxial with sleeve 35. Sleeve 40 has an end portion 4I fitted onto portion 31 of said member 35. Adjacent portion 4I is an internal collar 42 contacting the outer end of member 35. Said sleeve 46 is also formed at its outer end with an opening 44 for thepurpose hereinafter appearing.

Extending through opening 36 in member 35 is an axial shaft 45. The shaft 45 extends to both sides of member 35. Attached to the inner end 46 of shaft 45 is a beveled gear 41 abutting the inner side of member 35 and projecting into the cylindrical `chamber I6. Gear 41 may be pinned to the 'shaft or otherwise attached thereto. Pinned to shaft r45 and abutting the outer end of member 35 is a collar 49. Attached to the outer end of shaft 45 is an axial sleeve 59 located within the outer sleeve 40 and terminating short of the outer end of said inner sleeve. Said axial sleeve 50 is forrried with a longitudinal slot 5| for the purpose hereinafter appearing.

The outer sleeve 40 is attached to portion 31 of member 35 by means of a set screw 40aor in any other suitable manner.

Attached to the bottom wall i2 of the easing is a screw 55. Screw 55 is formed with a shank 55 screwed within the threaded opening 28. It has a shoulder 51 contaetih'g the upper surface 22 of bottom wall [2i of the casing. It is also formed with an enlarged head 58.

Rotatably` mounted on screw 55 is a beveled gea-r S meshing with the beveled gear 41. Gear 60 is formed 'with an aiial opening 5| to receive shoulder 51 "and head 58 of screw 55. VThe bottom surfac'eof gear 50 rests on the bottom walls 22. Itis heid on the Abc'ittom surface '22 by the Yscrew 55 while permitting the gear to rotate. Attached to the top of gear 6U is a central bridge or hub 64 overlying the head of the screw '55. Said hub S4 is formed with Van onset threaded opening '5. Screwed into 'said threaded opening is a pivot pin 66. Connected to 'said pivot 'pin 'is a link 61. l

Mounted for recprocation within the axial opening 2t of the easing is 'arod 1Q. Rod 10 is formed' with a slot 1| at one end. Fixed to the 'rod and traversing 'said 'slot is a pivot pin 12. The link 61`is pivoted at Vits opposite end to the 'pivot pin 12. It will now be understood that as shaft 45 is rotated, gear 41 willturn gear 260, VVtifh'ich 'turn will reciprocate 'member 10.

Member 10 is formed with an axial opening T4 extending to the outer 'end thereof. It is also 'formed with an externally threaded outwardly tapering portion 15. The tapered portion 15 is formed with a plurality of longitudinal slits. It will be noted that the 'taperedportion 15 is reii'ce'd in diameter 'toward its outer end. Screwed onto the tapered portion 'is a tapered sleeve `80. Sleeve `80 Yis vforin'ec'i with 'an 4'internally 'threaded portion 8| 'ntted 'within the outer end o 'f ofnferling-f20"and engaging the 7threaded portion 15. Member 80 is 'formed 'with'a head 82 "at its' outer end. As member 00 is rotated, it

Will squeeze together the'slitted portions 15 to fgrip the shankV 81 'o'f aniinstrument inserted `into 'the l`opei`1`i'1"1g 14. v'/Vhen member 82 is rotated in Van opposite direction, it lwill *loosen slitted 'portions 15 t0 pe'lfni't the shank '0f the tO'Ol to be withdrawn from 'the chuck.

v The instrument |0 lmay be operated by'means `fof "a usual 'flexible'sha'ftfone 'end of which is "shown 'at 90. Thieiiexibleshaft E90may be `provided kat `'one end with a connector lhead 9| 'formed with an annular groove 92 'of curved Ihe ball "95 projects into groove 92. -It also 'projects into 'opening '94. "The opening 44 has diameter 'greater jthal the diameter *O'f lball 95. The openin'g`i94, however, is smaller.

the head 9| is slipped into the sleeve, the ball 95 will open up the split sleeve 93 and permit said head to move past the ball, which permits the ball 95 to snap into the groove 92. The head 9| is attached to the easing Sla, for the rotary fiexible shaft 95. The head 9| is formed with an axial through opening 96a. Attached to the flexible shaft 96 is a rod 91 which passes through the axial opening 96a. The rod 96 may enter the sleeve 50 which is nxed to the gear shaft 45. On rod 91 is a rib or key 98 which enters the slot 5|. It will now be understood that rotation of the flexible shaft 96 will cause rotation of shaft 45 for operating the mechanism.

The instrument may be attached to a usual drill press |00 for operation thereby. In such event, the sleeve 40 is removed by unscrewing the vset screw 48. The usual chuck of the drill press may then be engaged with the projecting end of shaft 45 as shown in Fig. 5 of the drawing. The casing may be held against rotation by vmeans of a pair of arms |0| which may be attached as at |02 to the frame |03 of the drill press. The arms |0| may be attached to the sides of the casing Said arms may be provided with bosses |04 which enter the recesses 25. The said arms may be formed with through openings |06 registering with the opening 26 to receive screws |01 for attaching said arms to the casing. The tool 81 is attached to the instrument and is reciprocated vertically. When the drill is operating the instrument may be lowered Aor raised and Aadjusted in position. To this end the arms |0| may be formed with slots |0|a to .receive the attaching screws `|02 which pass through the slots. The provisions of the slots permits adjustment of the arms |0| and .instrument |.0.

Some jewelers have flexiblerotary shafts which are provided with a taperedA chuck Yat one end. To attach the instrument |.0 to such a chuck, the :sleeve 40 isremoved. Also sleeve 35.is unscrewed together with shaft 45, collar 49, and gear 41. As shown in Fig. 6, there is then 4screwed into the threaded opening I9 a sleeve 31a similar to sleeve 35. Extending through the screw 31a is a shaft ||0 to one end of which is attached a gear 41 similar .to the gear 41 of Fig. V3. Also attached to shaft ||0 is a collar 49 ysimilar Ato the collar 49 in Fig. 3. The shaft ||0, however, preferably extends rearwardly to greater length than shaft 45.

Mounted on the rear end of screw 31 is a sleeve |2. The sleeve ||2 may be attached 'to screw 131 by means Vof an attaching screw 40a. Sleeve |,2 has a tapered internal opening A| |3 to receive the usual tapered chuck on a ,flexible shaft. 'The tapered chuck may enter the sleeve I|2 and Will -grip the Vrear .end ofshaft |0 to rotate thelatter.

If desired, the sleeve ||f2 may be entirely removed so that larger chucks maybe iused as grip shaft I0.

InFig. 8 there is shown an instrument lua ,embodying the invention and illustratinga modified construction. ,The mstrument 0a comprises Va tubular casing |30 having an enlarged bore |3| iat .one end, a reduced intermediate bore |32, and

a still further reduced bore 33 :at its opposite end. Between bores |,3| and '|32 is a shoulder |34. Between bores |32 and |33 is a shoulder |35. Projecting into bore |3| is aninner sleeve |30 abutting shoulder |34. Casing |30 may be -nxed to member |36 by a set screw |31. Memberl't has a portion |38 of reduced diameter projecting rearwardly. Received on said portion |38 Ais 'a sleeve |40. Sleeve |40 may vbe fixed to portion |38 by a set screw 14|. The sleeve |40 contacts-a shoulder |42 on member |36 andit alsoicontacts the rear end'of casing |30. 'The Yinner sleeve member |36 is formed at its frontend with an enlarged axialbore |43 and at its rear endv with a' reduced bore |44. Between said bores is a shoulderv |41. Rotatable within sleeve |36 is a 'shaft'l |50. Shaft |50 has an enlarged portion |5| disposed in bore |43fand a reduced shaft portion `|5 2 infbore portion |44.` Shaft |52 projects vrearwardly into sleeve |40. Sleeve |5| is formed-with an'V inclined annular groove |53'for the purpose hereinafter appearing. On shaftportion V|52 is yfel-fixed collar" |55 contacting the rear end ofthe inner sleeve |36. Shaft "|50 maybe rotated by anyfsuitable'rneans such as a flexible drive, a drill, a jewelers lathe, or in any other suitable manner.

Mounted within casing |30 for reciprocation is a chuck |60. The chuck |60 has a head I6| within bore |32 and aportion |62 of reduced diameter Within bore |30. Portion |6| is formed with a longitudinal external slot |63. Fixed to the cas- 'ing' |30 is a pin |64 projecting into the slot/|63 toprevent rotation of member |60. The head |6| is'frm'ed with a'socket |65 receiving theforwa'rd dof'fportion |5|.- v ixefd to the head-IBI is a pini- |66 projecting 'into slot |53 so that-as shaft |50 rotates, member -150 will bereciprocated. Portion |62 of member Avi610isjforrned at -its outer-end with an externally screwjjthreaded outwardly and downwardly -ta- 'peringportion |10. Said portion |62 isformed with anaxial-bore oropening |1| to receive-the fswhalnlrV |12'of a tool to be reciprocated. 'Ihe outer taperportion |10 may be formed with a plurality of longitudinal slits |10a to form a chuck for gripping the shank |12. Screwed onto portion |10 is a tightening screw |14 for causing the chuck to grip the tool. Obviously, when member |10 is loosened, the tool |12 may be removed.

In Fig. 9 there is shown an instrument |0b embodying the invention. tubular casing formed at one end with an enlarged bore |16. It is also formed with an intermediate bore |11 and with a bore |18 of reduced diameter adjacent its forward end. Fixed within casing |15 is a sleeve member |19 having a portion |80 projecting from the casing; mounted on said portion |80 is a sleeve |8| xed thereto by a set screw |82 or in any other suitable manner. Member |19 is formed with an enlarged bore |83 at its forward end and with a reduced bore |84 at its rear end.

Rotatably mounted within member 19 is a member |85 having a rearwardly extending shaft |86 projecting into sleeve |8I. Member |85 yfurthermore comprises an enlarged cylindrical head |81 formed with an inclined, forward, cammed edge |80. Member |10 may be fixed to the casing |15 by a set screw |90. Mounted for reciproc-ation within casing |15 is a member |'9|. Member |9| is formed with a socket 92 partially receiving the head |81. Said socket 92 is formed with an external longitudinal slot |93. Fixed to the casing is a pin |94 projecting into said slot |93 to prevent rotation of member |9I. Fixed to a wall of said socket |92 is a pin |85 contacting the cammed edge |88. Member |0| is provided with a portion 200 of somewhat reduced diameter forming a shoulder 20|. Surrounding portion 200 is a coil Compression spring 20'2 interposed between shoulder 20| and an internal shoulder 203 formed between bores |11 and |18.

Any suitable means may be provided to rotate member |85. As member |85 rotates, the

The same comprises aY 6.. cammed edge` |88 will move member-19t tothe right. Thespring 202'wi1lmovemember |9| to the left. Thus' as member 85 rotates, member |9| will be reciprocated.A Member |9| maybe provided at its outer end with a chuck to grip the shank |82 of a tool similar to the structure shown-in Fig. 8. :l 1 y y Y IIf desired, the-instrument may be -attachedto a usual jewelers lathe. In suchevent-the member 85 iszreplaced by amember 20, having a shaft portion |200(r .as shown in Fig. 7. of the drawing.; Attached to theshaft |20a is a collar |2|'.1The collarv |'2| maybe pinned to shaft l|20 and is tapered. sofas to cooperate with the chuck of a jewelers lathe. The shaft |20 is provided with. a` usual `keygroove |23 withan annular groove |24 adjacent thereto and with a rear externally screw threaded end portion |25. With such construction, the instrument may-be lattached to a jewelers lathe. The jewelerslathe may, furthermore be provided with arms |26 having bosses|21 received in recesses |21 in theside walls-of the .instrument casing. Said bossesare provided with central through openings |281; to receive screws 28 screwed within threaded openingsA |26a of saidcasing, at the bottom ofthe recesses for; attaching said arms to the casing. `'The arms |26 may be attached to any f'lxedsupport to prevent the casing vfroml rotating as the zmember|20 -is rotated for operating -the instrument j -g ,l f It v'will beunderstood that shafts 45 or ||0 I ,nay be replaced by shafts such as shaft |20a adapted to be=received in'a-jewelers chuck, if desired. l

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that al1 matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. Motion converting mechanism comprising a casing formed intermediate its length with av chamber open at its outer end and having an inner end wall, and side walls, there being an opening formed centrally of the inner wall, end portions of the casing being formed with longitudinally extending bores having their inner ends communicating with the said chamber in opposed relation to each other, a removable cover for the open outer end of the chamber, a beveled gear in said chamber disposed against the inner end wall thereof and formed with a center opening registering with the opening in said inner wall, and having its outer end portion enlarged and forming an annular recess, a fastener extending through the opening in said gear and received into the opening in said inner wall, and having a head at its outer end countersunk in said recess, said screw rotatably mounting said gear and having its head ush with the outer surface of the gear, a block detachably secured against the outer surface of said gear and covering said head and constituting a hub for the gear, a drive shaft rotatably mounted through the bore of one end portion of said casing and at its inner end carrying a beveled pinion meshing with the beveled gear, a rod slidable longi- ,-mgsres 7; ftudinaliyithrough vtlreiborein the otlienendmor- @tion of the fcasing, ia'link pivot'ed ato Ethe inner fenofo'ff :said :rod and over-.lapping ssai'd hub, Aand o. pin. :carried fb'y .and projecting outwardly :from said hub in eccentric relation tthereto, theouter encl /of :sa-id flinkb'e'ing formed *with an opening through which said pin on the hub passes vand ibeing lfthereby pivotally lconnected 'with :the rhub 'and fservin'g fto Ifimpa'rt ilongitudinal reciprocating v:motion to said rod 'during the :rotation of the *beveled'gearand thehub b'ock.

' 22. *Motion v conve'er'ting mechanism' -comprising 'a casing fformed yintermediate "its 'i-l'en'gth with a chamber open vat its outer vend and "having =an inner lend wall, "and -fs'i'd'e walls, there being *a threa'ded Aopening i'formedcentrally v:of the inner wall, end -portions of :the fcasing'lbeing formed :with longitudinally extending bores having their "inner-ends communicating with 'the said chamber iin' Opposed relation to each other, a removable 'cover for the open Iouter end of theehamber, la pbeveled =gear in said chamber disposed against it-he 'inner 'end wallthereof and fformed with la "center opening registering with -the Vthreaded open-ing vandhaving its louter "end portion en- 1st-aged and forming 'an annular recess, a screw eentendu-1g through the-opening in said gear .and

.screwed 'into'lthe threaded fopening #and having -`a head yat lits outer Avend fcountersunk vin said recess, said screw rotatably :mounting said gear and 'having its head ilush with the outer surface of drive shaft rotatably mounted through the bore 35 2,372,731

8 for Aom: tend portion @ofssaid `casing .andiat sen'd :carrying ,a beveled pinion meshing with J'beveled gear, a 'rod slidable ongitudinally through the bore :in the other 'end :portion-tof 'the zcasing, a 'link Vpvoted vto the 'inner vend .of Said .rod and overlapping said hub, and a 'screwcab ried Vby and projecting outwardly from lsaidihub :in eccentric relation thereto, .the outer endof said link 'being 'formed with an openingthrouglz which .the -screw on the hub passes and :being thereby -pivotally connected with therhub land Aserving to fimpart longitudinal reoipromattm; motion to -said rod during the :rotation :of fthe beveled igear and thehub block.

ALFRED A. zBAMIBERGER.

REFERENCES CITED The v'following references vare 'of record finithe "le fof this patent:

UNITED STATES'PATENTS `Number Name Date 838,999 Hylander Dec. I1-8, 1906 933,718 Mahoney Sept. '7, :1909 1,048,684 Gooch Dec. 31, .19142 1,134,047 Hunter Mar. 30,1915 1,391,092 Beach -Sept. 20, E1.921 1,588,832 Young June 15, 1926 1,793,053 Cahill et al Feb. 17, 1931 1,801,011?? Major Apr. 14, 1930 V1,866,529 Farkas `July 12, 1932 2,215,222 Levy Sept. :17, .1940 2,240,755 Briggs May 6, .11941 A2,274,448 Hoover Feb. 24, VV1.942

Nalback etal. Apr. 3.- 

